louis



C. T. WESTLAKE. DOUBLE ROLL CRUSHER. APPLICATION mu) NOV. 30. 1911.

Aug. 26, 1919.

atentml Ill [H @di'l mumumlnmrimnmiiml UNITED STATES PATENT OFFICE.

CHARLES T. WESTLAKE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO COMMONWEALTH STEEL COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF NEW JERSEY.

DOUBLE-ROLL CRUSHER.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed November 30, 1917. Serial No. 204,689.

- to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates generally to crushing or pulverizing machines and more specifically to that type of crushing machlnery employing a pair of comparatively heavy rolls between which the material is crushed.

Machines of the type to which my invention relates are largely used for crushing and pulverizing coal, clay, and certain kinds of ore, stone or the like.

The principal object. of my invention is to provide a comparatively simple crushin machine having two rolls, one preferab y solid and the other being made in sections, each section being yieldingly mounted, preferably upon springs, so that a large uncrushable object or piece of material may be permitted to pass between the solid roll and one or more sections of the other roll without disturbing or changing the normal operative positions of the other sections. Very frequently in crushing material between heavy rolls an extraneous object such as a comparatively large metal tool, will accidentally be delivered or dropped into the ho per with the material which is being re need, and likewise certain kinds of material will contain uncrushable objects such as comparatively hard stones, and if some provision is not made for removing or bringing about the automatic discharge of these extraneous objects, they will clog the machine and either stop the same or matellially injure the surfaces of the crushing ro s.

My improved construction contemplates a crushing roll made up of separate and indeplendently movable sections, each of whic is supported by a plurality of comparatively heavy compression springs so that the roll as a whole will perform its normal and ex ected functions, but if an uncrushable object is encountered, one or more of the sections will move away from the solid roll, thereby permitting the object to pass between the rolls without injury thereto and without affecting the normal operation of the remaining or unmoved sections.

With the foregoing and other objects in view, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompan'ying drawings, in which- *igure 1 is a plan view of a machine of m improved construction;

*ig. 2 is a vertical section taken approximately on the line 2-2 of Fig. 1;

Fig. 3 is an enlarged detail section taken approximately on the line 33 of Fig. 1.

Referring by numerals to the accompanying drawings, 10 designates a substantially,

rectangular frame or housing, the same being open at top and bottom, and arranged on top of the side walls of this housing. are the oppositely disposed pairs of bearings 11, 12 and 13. Journaled in the bearings 11 is a shaft 14 which is driven in any suitable manner, preferably by a motor, and

fixed on said shaft is a pinion 15.

J ournaled in the bearings 12 are the trunnions of a solid crushing roll 16, one of which trunnions carries a gear wheel 17 which meshes with pinion l5. Journaled in the bearings 13 isa shaft 18, the main body portion of which is preferably square or noncircular in cross section. 1

Fixed on one end of this shaft 18 is a gear wheel 19, the same meshin with a corresponding gear wheel 20 whic 1 is fixedon one of the trunnions of the roll 16. Disposed around shaft 18 is a series of'comparatively heavy rings 21 of uniform diameter, and

" preferably of a diameter equal to that of the solid roll 16.. Each of these rings is supported by a plurality of comparatively heavy compression springs 22, the inner ends of the latter being suitably'supported on the non-circular portion of shaft 18. In order to maintain these springs in proper position, I prefer to form suitable spring seats or pins on the shaft 18 and the inner surfaces of each ring 21, and which seats or pins receive the ends of the springs.

Thus it will be seen that one of the crushing rolls is made up of a series of spring supported sections each of which is indepe'ndently movable away from the solid roll, such movement takingplace, as he'reinbe'fore stated, when an uncrushable object 'is fed to the machine with the material which is be ing crushed.

The springs 22 serve as yielding spokes for the rings 21 and normally retain said rings in proper position, and the entire series of rings when normally positioned, constitute a crushing roll which cooperates with the, solid roll 16 in crushing in the usual manner the material delivered to the machine. 1

A suitable hopper 23 is supported by the sidewalls of the frame 10 and extends a suitable distance above the crushing rolls.

In Figs. 1 and 2 I have shown one of the movable rings shifted out of alinement with the other rings-and away from the solid roll, and which action, it will be understood, takes place when an .uncrushable object passes between the rolls.

A sectional roll constructedin accordance with my invention is, of course, applicable foruse in machines employing breaker plates or'like elements against which the material is crushed.

'the walls of which It will be readily understood that minor changes in the size, form and construction of the various parts of my improved crusher can be made and substituted for those herein shown and described, without departing from the spirit of my invention, the scope of which is set forth in the appended claim.

I claim:

In a machine of the class described, a frame, a solid roll journaled for operation in said frame, a shaft journaled in the frame adjacent to said roll, driving gears connecting said shaft and solid roll, a series of separately formed and independently operating rings disposed around the shaft, which CHARLES '1. WESTLAKE. 

